Armored concrete construction.



E. COIGNET.

ARMOB-BD CONCRETE CONSTRUCTION.

APPLICATION FILED JAN. 22, 1907,

905,056. Patented Nov. 24, 1908 4 SHBBTSSHBET 1 mvENTbR WITNESSE I 4 gg5 6W.

ATTORNEYS E. COIGNET.

ARMORED CONCRETE CONSTRUCTION.

APPLIOATION FILED JAN. 22, 1907.

905,056. Patented Nov. 24, 1908.

4 SHEETS-SHEET 2.

ATTORNEYS B. GDIGNET.

ARMORED GONGRETE GONSTRUGTION.

APPLICATION FILED JAN. 22, 1901 905 ,056. Patented Nov. 24, 1908.

4 SHEETS-SHEET 3,

m-m ass as INVENTOR ATTORNEYS UNITED STATES PATENT OFFICE.

EDMOND GOIGNET, OF PARIS, FRANCE.

ARMOBED CONGEETE CONSTRUCTION.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filedlanuary 22, 1907. Serial No. 353,488.

To all whom it may concern:

Be it known that I, EDMOND Comnnr, a citizen of the French Republic, andresiding at Paris, Seine, Rue de Londres, in the Republic of France,have invented certain new and useful Improvements in Armored ConcreteConstructions, of which the following is a full, clear, and exactdescription and for which I have applied for Letters Patent in France,dated January 8, 1906.

The present invention relates particularly to reinforced concreteconstruction and the object of the invention is to provide an improvedreinforcing structure for the beam, substantially as hereinafterspecified.

Upon the accompanying drawings which illustrate my invention:-'Figure 1is a per spective view. Fig. 2 ,is a cross section of the armorin'g.Fig. 3 is a. diagram of one set or system of members viewedlongitudinally. Fig. 4 is a similar view of another set of members. Fig.5 is a plan-diagram showing certain parts superposed.- f Fig. 6 is a.longitudinal View of the framework or armoring set up in position. Figs.7, 8 and 9 are views of certaln forms of stirrups emloyed. Fig. 10 is,a. perspective view of a double form of the arrangement illustrated inFig. 1. Figs. 11, 12 and-13 are respectively an elevation andcrosssections on lines 12--12 and 13-48 of Fig. 11, of another form ofthe invention. Fig. 1.4: is a plan of F i 11. Figs. 15 and 16 are. aside elevation an end view of a further modification. Figs. 17 and 18are a sectional elevation and plan view respectively of another form,and

igs. 19 vation forms of hollow slab-provided floors.

T he temz'oual system or mcmbers.-The resistance to tension of theconcrete being no ligible, the armoring alone is to be con si cred. Thenew system which I claim and as shown on the drawings at Fig. 1, inperspective, is designed to form a metallic girder of a suflicientrigidity to be able to be placed wholly erected or partly erected in theshuttc'ring where the, concrete is poured or deposited, and to resistwithout displacement ofjany of its parts the most energetic ramming ofthe concrete.

The metallic girder is composed essentially of two straight parallelrods or bars of the whole length of the beam to be constructed inarmored concrete, the one e situated at the lower part of theshutterithe other f situated at the upper part this and 20 show both insectional elelatter. These two bars e and f of any suitable shape, butenerally bars of round shape are united y any number of other bars orrods 9 hot the same section and shape or of different section and shape.These rods 9 and h are cranked at their two extremities, first in thevertical plane for the whole height of the beam, preferably at 45 or 90or at any other angle, and a second time at 90 in a horizontal plane andfor a sufiicient length to pro'ect outside the beam, so as to bear upont e rod f alternately'to ri' ht and left, and to be attached in anysuita le manner to the special armorings of this concrete; some of theserods, the rods h it h etc. fall to the right and the others the rods 9 g3 fall to the left. of e. In Figs. 2, 3, 4 an 5 I have intended to showthat of the straight ositions determined theoretically by the variationof the bending moments alon the beam by reason of the distribution 0 theload, )resents in its Whole a section varying accor ing to the value ofthe .moment of the external forces at the point considered.

(2) The parts inclined upwards at 45 or at 90 or in any other mannerform transverse amorings converging from the middle towards theextremities in conformity with the requirements of the shearing forcerelative to beams subjected to a uniformly distributed load which is themost general case. It should be noted that in Fig. 5 the arrangementisquite imaginary since the rods 0 h and g are su rposed.

This framewor set up in position is shown in Fig. 6. It will be remarkedthat all these rods are attached together (see also Fig. 1) by (1) theligatures i (Fig tour-branched stirrups k *ig. 7) ap licable to anarmoring completely mounted eforehand, or the tour-branched stirrups lomoring partly mounted beforehand and (3) the tworanched stirrups m (Fig.9) Thus my new armored or reinforced beam constitutes a rigid wholedesigned so as to be of equal resistance throughout, both as regardsshearin forces and bendingmoments. Besides, t e transversearlnoringnsmake only one with the longitudinal tensional armorings andthe horizontally cranlced extremities being attached to the armt;

(1) The longitudinal armoring composed 6); (2) the (Fig. 8) which can beslipped upon an arconcrete, form a perfect bond between the members intension and those in compression; this cranked extremity has also foreffect to reinforce the concrete in a strained part, where the armoringis embedded.

It is to be Well understood that. a beam may comprise one or more ofthese sets of armoring rods placed side by side, and that from theforegoing it results that the armoring can be constructed in the worksitself and of any suitable materials.

5' stem or members in compression-- the openings 1, 2, 3, t, and 5, 6,7, 8, which have then only to be closed by one of the processesmentioned above SFig. 19). I am thus able to construct a hol ow floor byemploying the )rinciple of the procedure represented in ig. 520 which isa transverse section. For this purpose, ,the beams D and the ceiling Bin armored concrete being constructed in lace, the upper flooring iscompleted by p acing thereon slabs of armored cementof small thicknessor of pavement lights or in any other suitable manner.

Not ing prevents the combination of two armorings of the kind previouslydescribed so as to form a double armoriug completely or partlysymmetrical and this combnmtiou foreseen for the case of beams withoutconcrete or alternative y acted upon on one side or the other forms anintegral part of my invention. The combination of these two ar moringsof equal resistance can be effected by simple juxtaposition of onearmoring represented by Figs. 1 and 2 and an armoring identical, (or ifnecessary weaker) but inverted or that shown in perspective by Fig. 10.But most often the concrete can more economically resist compression andin this case I maintain constant the rectangular section or of the beamA sec Fig. 12) in only the parts where it is su lcient to balance L theforce of compression and I afterwards enlarge it progressively accordingto the increase in force, as shown in Figs. 1'], 12, 13 and 14. I mayalso increase progressively the thickness of the flange of the beam oragain increase both the thickness and the width, as shown in Figs. 15and 1G. The beam thus constructed being complete as regards compressionand elongation, it may be constructed in advance, placed in position andthe flooring or covering be finished by means of slabs inlaid as shownin Fig. 20 in transverse section. I may. also utilize the maximum spaceavailable between two consecutive beams A and A (see Figs. 17 and 18)and aftenwards diminish progressively this width until it is reduced tothe thickness of the Web a of the beam. in practice I leave onc'or morerectangular openings 1, 2, 3, 4, and 5, 6, 7, 8 (see the right of Fig.

18 in pl-n and Fi 17 in longitudinal sectlon) uch may c roofed orcovered bv slabs C of armored concrete (Figs. 1'.) unil 20) of slightthickness, made in advance, or by pavement lights or in any othermanner, which is immaterial as regards the resistance of the beam, sinceup to the line of these hollowed places, the force of compression isconsiderably reduced. This last arrangement enables me to constructeconomically hollow monolithic floors. For this purpose once the ceilingB is constructcd in armored concrete, 1' effect the centering of the n pconcrete n on the lower concrete and a bed These slabs C bear upon theupper part d of the armored concrete beams and upon the flange of theconcrete executed in place. These slabs may afterwards be incased ortitted in the walls or not.

Having thus described my invention what I claim as such and desire tosecure by Letters Patent, is:

1. Reinforcing construction for concrete, comprising a compressionmember and a primary tension member arranged in approximately the samevertical plane, in combination with secondary tension members comprisingsuperposed rods of unequal length arranged on each side of said planeand angled to extend between said compression and primary tensionmembers and oppositely elbowed at their ends across the same, eachindependently of the other and spaced apart, su )stautially asdescribed.

2. Reinforcing construction for concrete, comprising a compressionmember and a with secondary tension members arranged on each side ofsaid primary tension memher, said secondary members comprisin superposedrods of unequal length apgle to extend to the compression memberoppositely elhowed across the same at their ends, each indcpemlently ofthe other and spaced apart, substantially as described.

3. Reinforcing construction for concrete,

primary tension member arranged in approximately the same verticalplane, in com hination with secondary tension members comprisingsuperposed rods of unequal and angled to extend between said com ressionand primary tension members an opposllcly clbowcd at their ends acrossthe same, curb independently of the other, to-

hers.substantially as described.

4. Reinforcing construction for concrete, comprising a primary tensionmember and a supcqmscd substantially parallel compresteusion membersarranged on opposite sides of said primary tension member and-con-,sisting of superposed rods of unequal length angled to extend betweensaid compression Wards easi y withdraw this centering through primarytension member, in combination and comprising a compression member and a1 length arranged on each side of said plane ,gclhcr with tie bandsuniting all said memslon member. in combination with secondary andprimary tension members and oppo sitely elbowed across said tensionmember, each independently of the other and spaced apart, substantiallyas described.

5. A concrete beam reinforced by metallic compression and tensionmembers arranged substantially parallel to each other, in combinationwith secondary superposed tension members of unequal length arranged oneach substantially parallel to each other, in combination with secondarysuperposed tension members of unequal length arranged on each side ofthe plane of said compression and tension mom )GIS, angled to extendbetween the same and elbowed at their ends across and beyond the same toform supports for lateral flanges on the beam, substantially asdescribed.

7. A beam adapted for use in reinforced concrete construction,comprising primary tension and compression members, longitudinalreinforcing members of an 11:11 length arranged in sets on opposite sies of said primary tension and compression members and verticallysuperposed one upon another, said reinforcing members being each independently bent to extend between said tension and compression membersand terminally spaced apart and cranked across the same so as toreinforce the beam at all points, substantially as described.

8. A beam adapted for use in reinforced concrete construction, having amain tension member, auxiliary tension members arranged in sets u n oposite sides of the main tension mem r, an superim osed one upon another,the ends of the auxi iary tension members being angled across an upperchord and the members of one set being shorter than the members of theopposite set and reversely angled.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

EDMOND COIGNET.

H. C. Coxn.

